Fluorescence probe study of the interaction between acrylic acid-co-ethyl methacrylate copolymers and sodium dodecylsulfate

被引:7
作者
de Oliveira Tiera, VA
Tiera, MJ
Neumann, MG
机构
[1] UNESP, Dept Quim & Geociencias, Inst Biociencias Letras & Ciencias Exatas, BR-15054000 Sao Jose Do Rio Preto, Brazil
[2] USP, Inst Quim Sao Carlos, Sao Carlos, SP, Brazil
关键词
D O I
10.1081/DIS-100105203
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The interaction between sodium dodecylsulfate (SDS) and acrylic acid (AA)-ethyl methacrylate (EMA) copolymers has been investigated using steady state fluorescence and conductimetric measurements to assess the effect of the polymer composition on the aggregation process. Micropolarity studies using the ratio between the emission intensities of the vibronic bands of pyrene (I-1/I-3) and the shift of the fluorescence emission of pyrene-3-carboxaldehyde show, that the interaction of SDS with AA-EMA copolymers occurs at surfactant concentrations smaller than that observed for the pure surfactant in water and depends on the copolymer composition. The increase of ethyl methacrylate in the copolymers lowers the critical aggregation concentration (CAC) due to the larger hydrophobic character of the polymer backbone. The formation of aggregates on the macromolecule is induced mainly, by hydrophobic interactions, but the process is also influenced by the ionic strength due to the counter-ions of the polyelectrolyte.
引用
收藏
页码:177 / 184
页数:8
相关论文
共 28 条
[1]   EXPLORATORY-STUDY OF THE EFFECT OF POLY-ELECTROLYTE SURFACTANT AGGREGATES ON PHOTOCHEMICAL BEHAVIOR [J].
ABUIN, EB ;
SCAIANO, JC .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1984, 106 (21) :6274-6283
[2]  
ALMGREN M, 1992, LANGMUIR, V82, P405
[3]   FLUORESCENCE AND SOLUBILIZATION STUDIES OF POLYMER SURFACTANT SYSTEMS [J].
ANANTHAPADMANABHAN, KP ;
LEUNG, PS ;
GODDARD, ED .
COLLOIDS AND SURFACES, 1985, 13 (01) :63-72
[4]   Interactions between water-soluble polymers and surfactants: Effect of the polymer hydrophobicity .2. Amphiphilic polyelectrolytes (polysoaps) [J].
Anthony, O ;
Zana, R .
LANGMUIR, 1996, 12 (15) :3590-3597
[5]   POLYMER SURFACTANT INTERACTIONS - THE USE OF ISOTHERMAL TITRATION CALORIMETRY AND EMF-MEASUREMENTS IN THE SODIUM DODECYL-SULFATE POLY(N-VINYLPYRROLIDONE) SYSTEM [J].
BLOOR, DM ;
HOLZWARTH, JF ;
WYNJONES, E .
LANGMUIR, 1995, 11 (06) :2312-2313
[6]   POLYMER MICELLE INTERACTIONS - PHYSICAL ORGANIC ASPECTS [J].
BRACKMAN, JC ;
ENGBERTS, JBFN .
CHEMICAL SOCIETY REVIEWS, 1993, 22 (02) :85-92
[7]   ORGANIZATION OF SURFACTANT MICELLES ADSORBED ON A POLYMER MOLECULE IN WATER - A NEUTRON-SCATTERING STUDY [J].
CABANE, B ;
DUPLESSIX, R .
JOURNAL DE PHYSIQUE, 1982, 43 (10) :1529-1542
[8]   FLUORESCENCE PROBE STUDIES OF POLY(ACRYLIC ACID) CATIONIC SURFACTANT INTERACTIONS FOLLOWING HIGH-SHEAR [J].
CHOI, LS ;
KIM, OK .
LANGMUIR, 1994, 10 (01) :57-60
[9]   EFFECT OF CATIONIC SURFACTANTS ON THE CONFORMATIONAL TRANSITION OF POLY(METHACRYLIC ACID) [J].
CHU, DY ;
THOMAS, JK .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1986, 108 (20) :6270-6276
[10]   ASSOCIATION OF POLY-ELECTROLYTES WITH OPPOSITELY CHARGED MIXED MICELLES [J].
DUBIN, PL ;
OTERI, R .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1983, 95 (02) :453-461